Results 81 to 90 of about 8,376 (257)

Instability mechanism and failure characteristics of underground cavern in block system under the action of seismic waves

Deep Underground Science and Engineering, EarlyView.
Seismic waves with tensile stress, high amplitude, and low frequency are most likely to trigger block instability and sliding. Blocks with a single sliding surface are more prone to movement than those with multiple constraints, and roof‐positioned blocks are especially vulnerable to slide.
Xiao Wang, Jinxiao Liu, Gaoshuo Zhang, Wenxin Li, Changdi He   +4 more
wiley   +1 more source

An Adaptive Virtual Inertial Control Strategy for DC Distribution Networks

Energies
The DC distribution network is a low-inertia system, which is very sensitive to load disturbance, system failure, and other factors. By adding virtual capacitance to the converter connected to the power supply, the virtual inertia of the DC power grid ...
Junhua Xu, Weixun Liu, Guopeng He
doaj   +1 more source

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Frequency Response Analysis of a Single-Area Power System with a Modified LFC Model Considering Demand Response and Virtual Inertia

Energies, 2018
The modern electric power system is foreseen to have increased penetration of controllable loads under demand response programs and renewable energy resources coupled with energy storage systems which can provide virtual inertia.
Muhammad Saeed Uz Zaman, Syed Basit Ali Bukhari, Khalid Mousa Hazazi, Zunaib Maqsood Haider, Raza Haider, Chul-Hwan Kim   +5 more
doaj   +1 more source

Estimation of inertia demand in power systems considering wind power virtual inertia

International Journal of Electrical Power & Energy Systems
The high proportion of renewable energy integrated into the grid through numerous power electronic devices has reduced the overall system inertia level and operational stability and caused poor disturbance resistance. Considering the frequency stability of power systems, this study proposes an inertia demand assessment method for renewable energy power
Hongchun SHU, Haifei DONG, Jing CHEN, Guangxue WANG, Xi WANG, Botao SHI   +5 more
openaire   +2 more sources

Seismic analysis and design of tunnels within fault ground: A review

Deep Underground Science and Engineering, EarlyView.
The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang, Yujing Jiang, Xuepeng Zhang, Yuyong Jiao, Ningbo Li, Xiao Wang, Bo Li   +6 more
wiley   +1 more source

Virtual inertia control to active support of the variable-speed wind turbine in variable frequency limit time

Frontiers in Energy Research
Constraining the virtual inertia of variable-speed wind turbines within the variable frequency limit time will be the key to improving the wind power’s reliability in actively supporting the system frequency.
Gu Tingyun, Zhang Houyi, Li Bowen, Mao Junyi, Fan Qiang, Xu Yutao, Feng Qihui   +6 more
doaj   +1 more source

Whole tissue imaging of cellular boundaries at sub‐micron resolutions for deep learning cell segmentation: Applications in the analysis of epithelial bending of ectoderm

Developmental Dynamics, EarlyView.
Abstract Background To understand cellular morphology, biologists have relied on traditional optical microscopy of tissues combined with tissue clearing protocols to image structures deep within tissues. Unfortunately, these protocols often struggle to retain cell boundary markers, especially at high enough resolutions necessary for precise cell ...
Sam C. P. Norris, Jimmy K. Hu, Neil H. Shubin   +2 more
wiley   +1 more source

A fuzzy-based dual-port virtual inertia controller for enhancing dynamic performance in hybrid microgrids

International Journal of Electrical Power & Energy Systems
In hybrid microgrids (HMGs), reduced deviations and global power sharing can be expected by utilizing the interlinking converters (ILCs). However, the HMGs struggle to manage an optimal inertial response by interconnecting multiple AC/DC microgrids with ...
Yan Du, Jinxing Wang, Pengyu Chong, Xiangzhen Yang, Meiqin Mao   +4 more
doaj   +1 more source

A Meta‐Analysis and Systematic Review of Single‐Session Interventions for Eating Disorders

International Journal of Eating Disorders, EarlyView.
ABSTRACT Background There is a critical gap between the need for eating disorder (ED) treatment and provider availability. Single‐Session Interventions (SSIs) are structured programs intentionally designed for a single client encounter and show promise for filling ED‐treatment and prevention gaps by enhancing accessibility of evidence‐based ...
Sonakshi Negi, Marianna L. Thomeczek, Jennifer E. Wildes, Kelsie T. Forbush   +3 more
wiley   +1 more source